What is the purpose of setting the coal slurry flow rate fed into the GE coal-water slurry gasifier at half of the maximum load?
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After examining several GE water-coal slurry gasifiers, it turns out that the flow rate of the coal slurry used in startup within the process package is always half of the maximum load? For a maximum load of 44 m3/h, the coal slurry feed rate is 22 m3/h ； The maximum load is 52 m3/h, so the flow rate of the coal slurry fed in is 26 m3/h ； The maximum load is 56 m3/h, so the flow rate of the coal slurry fed in is 28 m3/h ； Why is it designed this way? What is the purpose?
Operating at half load serves as a buffer, allowing for adjustments to the process, equipment, electrical systems, instruments, and parameter settings, thereby achieving perfect harmony and coordinated operation. When the feed rate to the gasifier exceeds 50%, severe thermal shock occurs in the combustion chamber ； After feeding the material, it is difficult to control pressure and temperature ； When the feed rate to the gasifier is less than 50%, there are several disadvantages: the amount of coal slurry does not match well with the amount of oxygen, which may lead to an excess of oxygen. Safety first, energy conservation and environmental protection – upper limit on flare vent volume.